阅读说明：本技术 多管液态反冲灭弧装置 (Multi-pipe liquid recoil arc-extinguishing device ) 是由 王嬿蕾 王巨丰 陈宇宁 卢杨 骆耀敬 宋永锋 李�浩 何琪文 贾征浩 于 2021-08-09 设计创作，主要内容包括：本发明公开了多管液态反冲灭弧装置,属于防雷灭弧技术领域,包括倾斜反冲装置和竖向反冲装置,倾斜反冲装置与竖向反冲装置不平行且不垂直设置,倾斜反冲装置和竖向反冲装置内分别设置有倾斜反冲管绝缘液体和竖向管绝缘液体,倾斜反冲装置倾斜向上设置,倾斜反冲装置和竖向反冲装置处设置有金属电极。雷电流通过多个反冲管构成灭弧通道泄入大地。多管间的空气间隙延长了雷电流的入地时间,使电弧在反冲管内停留时间增加,减小了瞬时大电流对电子设备和建筑物造成危害,增加了多个电弧断口点,对贯穿性闪络实施多点同步截断电弧,把长电弧分割成短电弧并逐级熄灭短电弧单元,提高了对长电弧的灭弧能力,有效抑制了电弧的重燃。(The invention discloses a multi-tube liquid recoil arc extinguishing device, which belongs to the technical field of lightning protection and arc extinguishing and comprises an inclined recoil device and a vertical recoil device, wherein the inclined recoil device and the vertical recoil device are not parallel and perpendicular to each other, inclined recoil pipe insulating liquid and vertical pipe insulating liquid are respectively arranged in the inclined recoil device and the vertical recoil device, the inclined recoil device is arranged in an inclined manner, and metal electrodes are arranged at the inclined recoil device and the vertical recoil device. The lightning current is discharged to the ground through an arc extinguishing channel formed by a plurality of recoil pipes. The air gaps among the multiple tubes prolong the grounding time of lightning current, so that the residence time of the electric arc in the recoil pipe is increased, the damage of instantaneous heavy current to electronic equipment and buildings is reduced, a plurality of electric arc breaking points are increased, the electric arc is synchronously cut off at multiple points for the penetration flashover, the long electric arc is divided into short electric arcs and short electric arc units are extinguished step by step, the arc extinguishing capability of the long electric arc is improved, and the reignition of the electric arc is effectively inhibited.)

1. The multitube liquid recoil arc extinguishing device is characterized in that: the device comprises an inclined backflushing device and a vertical backflushing device, wherein the inclined backflushing device and the vertical backflushing device are not parallel and perpendicular to each other, inclined backflushing tube insulating liquid (3) and vertical tube insulating liquid (9) are respectively arranged in the inclined backflushing device and the vertical backflushing device, the inclined backflushing device is arranged in an inclined mode, and metal electrodes (5) are arranged at the inclined backflushing device and the vertical backflushing device.

2. The multi-tube liquid recoil arc extinguishing device of claim 1, wherein: the inclined backflushing device comprises an inclined backflushing pipe (1), an inclined backflushing pipe bottom electrode (2) and an insulating material (4), the inclined backflushing pipe bottom electrode (2) is arranged at the bottom of the inclined backflushing pipe (1) and is arranged in a grounding mode, the other opening end of the inclined backflushing pipe (1) is arranged on a metal electrode (5), the insulating material (4) is arranged between the metal electrode (5) and the inclined backflushing pipe bottom electrode (2), and the insulating material (4) wraps the outer side of the inclined backflushing pipe (1).

3. The multi-tube liquid recoil arc extinguishing device of claim 1, wherein: the vertical recoil device comprises a metal plate (6), a vertical pipe and a vertical pipe bottom electrode (8), wherein the metal plate (6) is arranged at the top of the vertical pipe and is connected with the metal electrode (5), and the vertical pipe bottom electrode (8) is arranged at the bottom of the vertical pipe and is grounded.

4. A multi-tube liquid recoil arc extinguishing device according to claim 3, wherein: the vertical pipe is arranged to be a U-shaped back flushing pipe (7), one side of the U-shaped back flushing pipe (7) is higher than the other side of the U-shaped back flushing pipe, the higher side of the U-shaped back flushing pipe is connected with the metal plate (6), the other side of the U-shaped back flushing pipe is arranged to be a nozzle, and the vertical pipe insulating liquid (9) submerges the bottom end of the U-shaped back flushing pipe (7).

5. A multi-tube liquid recoil arc extinguishing device according to claim 3, wherein: the vertical pipe is arranged to be a straight back-flushing pipe (10), a straight back-flushing pipe nozzle (11) is arranged on the side edge of the straight back-flushing pipe (10), the bottom electrode (8) of the vertical pipe is fixedly arranged at the bottom of the straight back-flushing pipe (10) in a sealing mode, and the height of the vertical pipe insulating liquid (9) is lower than that of the straight back-flushing pipe nozzle (11).

6. A multi-tube liquid recoil arc extinguishing device according to claim 3, wherein: be provided with between vertical pipe and metal electrode (5) sealed tube (12), metal sheet (6) set up the top at sealed tube (12), and sealed tube bottom plate (13) set up in the bottom of sealed tube (12), and for the metal electrode, sealed tube (12) are full of sealed tube insulating oil (14), and sealed tube bottom plate (13) set up the top at vertical pipe.

Technical Field

The invention relates to the technical field of lightning protection and arc extinction, in particular to a multi-tube liquid recoil arc extinction device.

Background

The parallel gap has been widely used in various voltage class lines due to its simple structure, convenient installation and low price. The use of parallel gaps on overhead transmission lines has been studied in japan, germany, france, etc. since the 60's of the 20 th century. China also develops parallel gap lightning protection devices of different voltage levels. However, the parallel gap device has a simple structure, so that the lightning trip-out rate is increased, and the service life of the breaker is shortened due to frequent on-load short-circuit arc breaking; the parallel gap must be used in conjunction with the recloser to exert its protective effect. In addition, the long-time power frequency arc ignition can cause accidents such as insulator damage, wire breakage and the like, so that the development of a parallel gap device capable of automatically extinguishing the arc is necessary.

The multi-tube liquid recoil arc-extinguishing device is researched aiming at the defects that the common parallel gap has weak self-arc-extinguishing capability, lacks of rapid arc-extinguishing capability, is easy to generate line insulator flashover, generates large power-frequency follow current, and damages insulator strings and hardware fittings.

Disclosure of Invention

The invention aims to provide a multi-tube liquid recoil arc-extinguishing device, which solves the technical problems of weak self-arc-extinguishing capability of the existing parallel gap, lack of rapid arc-extinguishing capability, easy generation of line insulator flashover, generation of large power-frequency follow current, and damage to an insulator string and hardware fittings. The gas in the ceramic tube is heated by the self energy of the electric arc, so that the temperature in the ceramic tube is increased, the pressure is increased, the electric arc is ejected out of the cavity, and the cold air is cooled to extinguish the arc.

According to the invention, the energy of the electric arc is utilized to heat the gas in the ceramic tube, so that the temperature in the ceramic tube is increased, the pressure is increased, the electric arc is ejected out of the chamber, and the occurrence of lightning trip is avoided. When the electric arcs pass through each back-flushing pipe one by one, the time for the lightning current to release energy is obviously prolonged, and the damage of instantaneous heavy current to electronic equipment and buildings is reduced.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the multi-pipe liquid recoil arc extinguishing device comprises an inclined recoil device and a vertical recoil device, wherein the inclined recoil device and the vertical recoil device are not parallel and perpendicular to each other, inclined recoil pipe insulating liquid and vertical pipe insulating liquid are respectively arranged in the inclined recoil device and the vertical recoil device, the inclined recoil device is inclined and upwards arranged, and metal electrodes are arranged at the inclined recoil device and the vertical recoil device.

Furthermore, the inclined backflushing device comprises an inclined backflushing pipe, an inclined backflushing pipe bottom electrode and an insulating material, the inclined backflushing pipe bottom electrode is arranged at the bottom of the inclined backflushing pipe and is arranged in a grounding mode, the other opening end of the inclined backflushing pipe is arranged on the metal electrode, the insulating material is arranged between the metal electrode and the inclined backflushing pipe bottom electrode, and the insulating material wraps the outer side of the inclined backflushing pipe.

Further, the vertical recoil device comprises a metal plate, a vertical pipe and a vertical pipe bottom electrode, wherein the metal plate is arranged at the top of the vertical pipe and connected with the metal electrode, and the vertical pipe bottom electrode is arranged at the bottom of the vertical pipe and grounded.

Further, the vertical pipe is set to be a U-shaped back flushing pipe, the height of one side of the U-shaped back flushing pipe is higher than that of the other side of the U-shaped back flushing pipe, the higher side of the U-shaped back flushing pipe is connected with the metal plate, the other side of the U-shaped back flushing pipe is set to be a nozzle, and the insulating liquid of the vertical pipe is arranged at the bottom end of the U-shaped back flushing pipe.

Furthermore, the vertical pipe is arranged to be a straight back-flushing pipe, a straight back-flushing pipe nozzle is arranged on the side edge of the straight back-flushing pipe, the bottom electrode of the vertical pipe is fixedly arranged at the bottom of the straight back-flushing pipe in a sealing mode, and the height of the vertical pipe insulating liquid is lower than that of the straight back-flushing pipe nozzle.

Further, be provided with the sealed tube between vertical pipe and the metal electrode, the metal sheet setting is at the top of sealed tube, and the sealed tube bottom plate sets up in the bottom of sealed tube, and for the metal electrode, the sealed tube is full of sealed tube insulating oil, and the sealed tube bottom plate sets up the top at vertical pipe.

Further, the arc extinguishing process of the U-shaped recoil pipe comprises the following steps: when the tower or the power transmission line is struck by lightning, the air is punctured to form an electric arc, then the liquid-electricity effect is caused, the air is punctured to form an electric arc between metal electrodes in the U-shaped tube, the electric arc discharges in the U-shaped tube containing liquid, and partial liquid in a discharge channel is instantly vaporized, decomposed and ionized into high-temperature plasma and suddenly expands to form a mechanical pressure wave which rapidly spreads outwards. However, since the liquid can be regarded as a shock wave transmission medium which cannot be compressed, when the discharge channel discharges in a liquid phase, an ultrahigh-power mechanical effect is presented to the outside, an impact acting force is formed in the U-shaped tube, and acts on the discharge channel in an impulse or impact pressure mode to impact an electric arc and cut off the electric arc.

The residual energy forms an electric arc in the ceramic tube through the metal electrode, and when the electric arc enters the ceramic tube containing liquid, the temperature of plasma generated by liquid-phase discharge is as high as 1500-3000K. High temperature and high pressure generated in the ceramic tube cannot be leaked outwards in time. The shock wave is reflected back and forth on the inner wall surface of the ceramic tube to generate a reflected shock wave, and the reflected shock wave is ejected from the arc inlet.

The long arc in the ceramic tube has large energy and large recoil force: the length of the ceramic tube is up to 50mm and the diameter is up to 10mm, so that the length of the arc formed in the ceramic tube after a lightning strike is sufficiently long. The principle of the recoil is to utilize the energy of the long electric arc to extinguish the arc, the longer the electric arc formed in the ceramic tube, the more obvious the Pascal effect is, the higher the pressure in the ceramic tube is, and the larger the impact force for cutting off the electric arc is.

The multistage recoil capability of attenuating the arc intensity step by step is formed by two recoil pipes: the electric arc of local impact discharge is subjected to recoil arc extinguishing inhibition at the initial stage of the impact electric arc, and the penetration flashover is subjected to multipoint synchronous arc interruption. The quantity of ions flowing out of the bottom of the recoil pipe in each stage of recoil extinction is far smaller than that of the introduced ions. Therefore, the number of ions entering the next stage from the recoil pipe is almost zero, and the recoil has huge attenuation effect on the electric arc intensity. The energy of the electric arc is greatly reduced after the electric arc is acted by the first recoil pipe, and the residual electric arc enters the second recoil pipe and is recoiled again to weaken the energy of the electric arc. In the whole process, the back flushing pipe plays a role in destroying the impact arc establishing channel, inhibiting the power frequency arc establishing process, reducing the probability of breakdown of the insulator and prolonging the service life of the insulator.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

the lightning current of the invention is discharged to the ground through an arc extinguishing channel formed by a plurality of recoil pipes. The air gaps among the multiple tubes prolong the grounding time of lightning current, so that the residence time of the electric arc in the recoil pipe is increased, the damage of instantaneous heavy current to electronic equipment and buildings is reduced, a plurality of electric arc breaking points are increased, the electric arc is synchronously cut off at multiple points for the penetration flashover, the long electric arc is divided into short electric arcs and short electric arc units are extinguished step by step, the arc extinguishing capability of the long electric arc is improved, and the reignition of the electric arc is effectively inhibited.

Drawings

FIG. 1 is a schematic view of a first embodiment of the present invention;

FIG. 2 is a schematic view of a second embodiment of the present invention;

FIG. 3 is a schematic view of a third embodiment of the present invention;

FIG. 4 is a schematic view of the high pressure seal arrangement of the gland of the present invention;

fig. 5 is a schematic view of the external reinforcement structure of the sealing tube of the present invention.

In the attached drawing, 1-an inclined recoil pipe, 2-an inclined recoil pipe bottom electrode, 3-an inclined recoil pipe insulating liquid, 4-an insulating material, 5-a metal electrode, 6-a metal plate, 7-a U-shaped recoil pipe, 8-a vertical pipe bottom electrode, 9-a vertical pipe insulating liquid, 10-a straight recoil pipe, 11-a straight recoil pipe nozzle, 12-a sealing pipe, 13-a sealing pipe bottom plate and 14-sealing pipe insulating oil.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings by way of examples of preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.

Example 1:

as shown in fig. 1, the multi-tube liquid-state backflushing arc extinguishing device comprises an inclined backflushing device and a vertical backflushing device, wherein the inclined backflushing device and the vertical backflushing device are not parallel and are not perpendicular to each other, inclined backflushing tube insulating liquid 3 and vertical tube insulating liquid 9 are respectively arranged in the inclined backflushing device and the vertical backflushing device, the inclined backflushing device is arranged in an inclined mode, and metal electrodes 5 are arranged at the inclined backflushing device and the vertical backflushing device. The inclined recoil device and the vertical recoil device are used for secondary arc extinction, the arc extinction directions of the inclined recoil device and the vertical recoil device are different, so that the arc extinction can be better realized, the liquid-electric effect is caused after the arc is formed through air breakdown, the energy of the long arc in the ceramic tube is large, the recoil acting force is large, and the multistage recoil capability of gradually attenuating the arc intensity is formed through the two recoil devices for arc extinction, so that the rapid arc extinction is realized.

The air breakdown causes the liquid electric effect after forming an electric arc: when the tower or the power transmission line is struck by lightning, air is punctured between metal electrodes in the U-shaped tube to form electric arcs, the electric arcs discharge in the U-shaped tube containing liquid, and part of liquid in a discharge channel is instantly vaporized, decomposed and ionized into high-temperature plasma to suddenly expand to form a mechanical pressure wave which rapidly spreads outwards. However, since the liquid can be regarded as a shock wave transmission medium which cannot be compressed, when the discharge channel discharges in a liquid phase, an ultrahigh-power mechanical effect is presented to the outside, an impact acting force is formed in the U-shaped tube, and acts on the discharge channel in an impulse or impact pressure mode to impact an electric arc and cut off the electric arc.

The residual energy forms an electric arc in the ceramic tube through the metal electrode, and when the electric arc enters the ceramic tube containing liquid, the temperature of plasma generated by liquid-phase discharge is as high as 1500-3000K. High temperature and high pressure generated in the ceramic tube cannot be leaked outwards in time. The shock wave is reflected back and forth on the inner wall surface of the ceramic tube to generate a reflected shock wave, and the reflected shock wave is ejected from the arc inlet.

The long arc in the ceramic tube has large energy and large recoil force: the length of the ceramic tube is up to 50mm and the diameter is up to 10mm, so that the length of the arc formed in the ceramic tube after a lightning strike is sufficiently long. The principle of the recoil is to utilize the energy of the long electric arc to extinguish the arc, the longer the electric arc formed in the ceramic tube, the more obvious the Pascal effect is, the higher the pressure in the ceramic tube is, and the larger the impact force for cutting off the electric arc is.

The multistage recoil capability of attenuating the arc intensity step by step is formed by two recoil pipes: the electric arc of local impact discharge is subjected to recoil arc extinguishing inhibition at the initial stage of the impact electric arc, and the penetration flashover is subjected to multipoint synchronous arc interruption. The quantity of ions flowing out of the bottom of the recoil pipe in each stage of recoil extinction is far smaller than that of the introduced ions. Therefore, the number of ions entering the next stage from the recoil pipe is almost zero, and the recoil has huge attenuation effect on the electric arc intensity. The energy of the electric arc is greatly reduced after the electric arc is acted by the first recoil pipe, and the residual electric arc enters the second recoil pipe and is recoiled again to weaken the energy of the electric arc. In the whole process, the back flushing pipe plays a role in destroying the impact arc establishing channel, inhibiting the power frequency arc establishing process, reducing the probability of breakdown of the insulator and prolonging the service life of the insulator.

In the embodiment of the invention, the inclined backflushing device comprises an inclined backflushing pipe 1, an inclined backflushing pipe bottom electrode 2 and an insulating material 4, wherein the inclined backflushing pipe bottom electrode 2 is arranged at the bottom of the inclined backflushing pipe 1 and is arranged in a grounding mode, the other opening end of the inclined backflushing pipe 1 is arranged on a metal electrode 5, the insulating material 4 is arranged between the metal electrode 5 and the inclined backflushing pipe bottom electrode 2, and the insulating material 4 is wrapped on the outer side of the inclined backflushing pipe 1.

In the embodiment of the invention, the vertical recoil device comprises a metal plate 6, a vertical tube and a vertical tube bottom electrode 8, wherein the metal plate 6 is arranged at the top of the vertical tube and is connected with the metal electrode 5, and the vertical tube bottom electrode 8 is arranged at the bottom of the vertical tube and is grounded. Vertical pipe sets up to U type recoil pipe 7, and the height on one side of U type recoil pipe 7 is higher than the height on the other side, and high one side is connected with metal sheet 6, and the other side sets up to the spout, and vertical pipe insulating liquid 9 submerges the bottom of U type recoil pipe 7.

The U-shaped pipe is vertically placed, a small amount of liquid is filled in the U-shaped pipe, a metal electrode is arranged at the bottom end of the U-shaped pipe, the upper end of the right side of the U-shaped pipe is sealed by the metal electrode, and the left side of the U-shaped pipe is opened; the upper end opening of the ceramic tube is provided with a metal electrode, and the U-shaped tube and the ceramic tube form a certain angle and are connected by adopting the metal electrode; the lower port of the ceramic tube is connected with a grounding terminal through a metal electrode.

When the tower or the power transmission line is struck by lightning, electric arcs can be formed in the U-shaped pipe containing liquid, a liquid-electricity effect is generated, a strong shock wave is formed, and the shock wave acts on a discharge channel in an impulse or shock pressure mode to cut off the electric arcs. The residual energy is transferred from the U-shaped tube into the ceramic tube through the metal electrode, the electric arc discharges in the ceramic tube filled with liquid, the action of the liquid-electric effect can be caused, strong shock waves are formed, and the strong shock waves act on a discharge channel in an impulse or shock pressure mode to cut off the electric arc. The remaining little energy is grounded through the ground terminal.

Example 2:

as shown in fig. 2, this embodiment is different from embodiment 1 in that the vertical pipe is provided with a straight back-flushing pipe 10, a straight back-flushing pipe nozzle 11 is provided at a side of the straight back-flushing pipe 10, a vertical pipe bottom electrode 8 is fixedly sealed at the bottom of the straight back-flushing pipe 10, and the height of the vertical pipe insulating liquid 9 is lower than that of the straight back-flushing pipe nozzle 11.

An arc extinguishing path of multi-pipe liquid recoil is designed. The ceramic tube 1 with the fork is vertically arranged, a small amount of liquid is contained in the ceramic tube 1, and the upper end and the lower end of the ceramic tube 1 are sealed by cylindrical metal plates; a metal electrode is arranged at the upper port of the ceramic tube 2, and the ceramic tube 1 and the ceramic tube 2 form a certain angle and are connected by adopting the metal electrode; the lower port of the ceramic tube 2 is connected with a grounding terminal through a metal electrode.

When the tower or the power transmission line is struck by lightning, electric arcs can be formed in the ceramic tube 1, a liquid electricity effect is generated, strong shock waves are formed, and the shock waves act on a discharge channel in an impulse or shock pressure mode to cut off the electric arcs. The residual energy is transferred from the ceramic tube 1 to the ceramic tube 2 through the metal electrode, the electric arc discharges in the ceramic tube 2 filled with liquid, the action of the liquid-electric effect can be caused, strong shock waves are formed, and the strong shock waves act on a discharge channel in an impulse or impact pressure mode to cut off the electric arc. The remaining little energy is grounded through the ground terminal.

Example 3:

as shown in fig. 3, this embodiment is different from embodiments 1 and 2 in that a seal tube 12 is provided between the vertical tube and the metal electrode 5, the metal plate 6 is provided on the top of the seal tube 12, a seal tube bottom plate 13 is provided on the bottom of the seal tube 12 and is a metal electrode, the seal tube 12 is filled with seal tube insulating oil 14, and the seal tube bottom plate 13 is provided on the top of the vertical tube. The sealing structure is changed to extinguish the electric arc through the Pascal effect.

The Pascal effect is formed, when the electric arc is formed, the electric arc can extrude liquid due to a closed structure, so that the liquid generates outward pressure, then the acting force is rebounded back due to the side wall, and the acting force directly points to the electric arc at the center, so that the electric arc can be quickly extinguished.

The pascal effect further enhances the liquid electrical effect: the pascal principle means: after any point in the incompressible static fluid is subjected to pressure increment generated by external force, the pressure increment is instantaneously transmitted to each point of the static fluid, namely, the pressure intensity is equal to the action pressure divided by the force-bearing area.

When the impact arc acts on the metal electrode, a certain pressure is applied to the liquid in the ceramic tube. According to the pascal principle, a pressure change occurring in a certain portion of the stationary fluid in the closed vessel will be transmitted in all directions with a constant magnitude. Then, the liquid medium around is impacted by a larger acting force from the discharge channel in the ceramic tube, the acting force rebounds after contacting the ceramic tube wall to form an acting force with the direction pointing to the center of the ceramic tube, so that the impact pressure generated in the liquid-electric effect is further enhanced, and the aim of cutting off the electric arc is fulfilled. And the longer the arc is formed in the ceramic tube, the greater the force acting on the wall of the ceramic tube, and in turn the greater the impact force to break the arc. Considering that the action time of the arc is short, strong recoil pressure is formed in the moment to act on the arc, the current of the arc is weak in the initial arc building stage, the electric field force for maintaining the arc formed by self-magnetic compression is small, so that a large impact force far exceeding the Lorentz force pressure intensity of the arc is formed, and the arc is cut off instantly.

A high pressure sealing structure and an external reinforcing structure are arranged in the sealing tube 12.

The high-pressure sealing structure of the sealing tube 12 comprises a plastic sleeve 21, a stainless steel gasket 22, an O-shaped ring 23, a steel sleeve 24, sealing silica gel 25 and an extrusion fixing block 26, wherein an electrode is nested in the sealing silica gel 25, the sealing silica gel 25 is hermetically arranged at two ends of the ceramic tube, the steel sleeve 24 is fastened at the outer side of the joint of the sealing silica gel 25 and the ceramic tube, and the plastic sleeve 21 is sleeved at the outer sides of the steel sleeve 24 and the ceramic tube. A stainless steel gasket 22 is padded at the front end of the electrode and an O-ring 23 is placed between the sealing silica gel 25 and the ceramic tube contact. The extrusion fixed block 26 is arranged on the outer side of the sealing silica gel 25, a bolt hole 27 is arranged on the extrusion fixed block 26, and the bolt hole 27 is arranged in contact with the stainless steel gasket 22. The sealing silica gel 25 is set to be a T-shaped structure silica gel, and the bottom of the T-shaped structure silica gel is set to be a spherical concave structure.

The shell is made of plastic insulating materials and is used for fixing the ceramic tube; the steel sleeves are arranged at two ends of the ceramic tube to fix the end part of the ceramic tube and prevent the ceramic tube from being mechanically deformed by the generated high-strength pressure; the upper and lower electrodes are wrapped up in the silica gel that is half arc, and narrow and small space when upper and lower electrode arc extinguishing, the area is little, produces the pressure dispersion phenomenon, wraps up the electrode with the silica gel of half arc and can focus the pressure wave, and the pressure of arc extinguishing passageway improves several times, effectively blocks the electric arc. The screw generates thrust to the stainless steel gasket and the silica gel assembly, so that the stainless steel gasket and the silica gel assembly are tightly matched with the O-shaped ring and the ceramic tube, the purpose of high-pressure sealing is achieved, high-strength pressure is well prevented from leaking, and the generated high-strength pressure can be guaranteed to act on the electric arc to the maximum.

When the device is struck by lightning, a liquid-electricity effect is generated, a strong impact pressure wave is formed, and the strong impact pressure wave acts on a discharge channel in an impulse or impact pressure mode to cut off electric arcs. Meanwhile, a certain pressure is applied to the arc extinguishing liquid in the ceramic tube, and according to the Pascal principle, the pressure change of a certain part of the static fluid in the closed container is transmitted to all directions invariably, so that a larger acting force is generated on the inner wall of the ceramic tube. The action rebounds after acting on the shell to form an action force with the direction pointing to the center of the ceramic tube, so that the purposes of cutting off the electric arc, reducing the amplitude of the current, reducing the gradient of the lightning wave and prolonging the discharge time of the electric arc are achieved, the arc is effectively extinguished, the structure is simple, and the sealing performance is good.

The external reinforcing structure of the sealing tube 12 comprises a top cover plate 31, an insulating screw 33, a bottom cover plate 34 and an insulating covering layer 35, wherein the top cover plate 33 is arranged at the top of the high-pressure sealing device, the bottom cover plate 34 is arranged at the bottom of the high-pressure sealing device, and the insulating screw 33 penetrates through the top cover plate 31 and the bottom cover plate

And the plate 34 is fixedly arranged, the insulating covering layer 35 is arranged on the outer side of the high-pressure sealing device, the top sleeve cover plate 31 and the bottom sleeve cover plate 34 respectively support against the extrusion fixing block 26, and meanwhile, the top sleeve cover plate 31 and the bottom sleeve cover plate 34 are provided with screw holes. The fixed effect is better, and the whole arc extinguishing device can bear larger pressure.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.